Can't use the "-only=foo" switch on Windows with named builds

[jonathanbiard]

I have 3 builders in one JSON file. One virtualbox-iso, one virtualbox-ovf, and one vmware-iso.

I was able to build them perfectly using the -only=virtualbox-iso, for example, but after specifying the "name" and "vm_name" on each builder, I am not able to build using named builds. Here is the simple error I am getting:

$ packer build -only=virtualbox-base-build-ovf packer.json
Unknown build in 'only' flag: virtualbox-base-build-ovf

I should note that I use user-variables to name them and override the scripts. For the override, the variable is in the key, not the value. I'm not sure if this makes a difference because packer is able to validate the JSON file successfully. Also note that I can no longer use the original "type" for the "only" flag since a "name" is specified.

[jonathanbiard]

Another note, which I just tested, it works when not using user-variables.

[davishmcclurg]

I've noticed that you can't use user variables in the only values of the JSON file either, eg: "only": ["{{ user name }}-virtualbox"]

[jasonberanek]

This issue was identified as a bug in #858. Closing this issue as a duplicate so discussion around the issue can be kept in one place.